What Is the Function of the Foramen Ovale During Fetal

What is the function of the foramen ovale during fetal life?

A) Allowing blood to flow directly from the right atrium into the left atrium.
B) Allowing blood to flow directly from the right ventricle into the left ventricle.
C) Serves as a valve in the vena cava to regulate venous blood flow.
D) Prevents back flow of blood from aorta into the left ventricle.
E) Prevents back flow of blood from pulmonary trunk into the right ventricle.